Operating mechanism for switches.



nuul'snnn -J.rococx, or DAYTON, OHIO.

OPERATING MECHANISM FOR SWITCHES.

To all whom it may. mm

v Be it known that I, Aiiep's'rnan J. Po-

COCK, a citizen of the United'States, residing at Dayton, in the county of Montgomcry and State of Ohio, have invented certain new and useful Improvementsin Operat'ing Mechanismsfor Switches; and I do hereby declare the following to be a full,

. clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to certain new and useful improvements in operatlng mecha nism for switches.

The object of the invention is to provide a switch operating mechanism of simple construction and desirable efliciency; one that will effectually controlthe circuit without causingarcs to form at the terminals,

and will permit the circuit to be opened or closed at different pressures.

. Referring to the accompanying drawings, Figure 1 is atop planrv iew of the device; Fig. 2 is a section on the line a.a of Fig.

1; Fig. 3 is a section on the line bb of Fig. 2; and Fig. 4 is a section on the line 0.0 of Fig. 3.

In the specification and drawings, similar reference characters indicate corresponding parts.

Referring more particularly to the drawings, 1 represents a frame plate provided with a horizontal right angled extension 2.

, Secured tothe said extension 2 is a block of suitable insulating material 3.upon which are, in turn, mdunted resilient bars 4. The

\ said bars 4 are attached to the insulating blocks 3 by means of bolts 5 which are provided with binding screws 6 to which'lead wires are attached. The free ends of the bars 4 are pfovided with pockets 7 which receiveterminal blocks 8. The blocks 8 are in positions to be engaged by contact members 9, thereby forming a. well known type of electrical switch. The insulating block 3 is provided with pockets 3 beneath the bars 4 which permit said bars to bend and theterminal blocks 8 to adjust themselves myself to this particular type of switch as Specification of Itetters Patent. Patented Feb, 16, 1915, Application filed July s, 1913. Serial no. 777,598.

double break switch may be provided. The

contact members 9 are mounted on an insulating block 10 attached to one end of anarm 11 pivoted at 12'to the frame .1. The

said contact members 9 are providedwith binding screws 13, and the leads therefrom, and those from the binding screwsfi may extend through openings 14 in a wall 15 attached to the frame 1 and extension 2. The said leads are connected to the source'of electrical energy and the motor in the usual manner. The upward movement of the arm 11 and the contact members 9 which are carried thereby is limited by a stop 16 mounted onan adjustably sliding member 17 secured to the. frame 1. The stop 17 limits the movement of the lever 19 in one direction, while the terminal blocks 8 act as stops and limit the movement of said lever in the otheridirection. The arm 11 is elevated and lowered under the influence of fluid pressure, such as water under pressure or compressed air, as follows. The said arm 11, which, it will be observed, is bifurcated, carries an antifriction roller 18 which is adapted to be engaged by the two inclined surfaces 19 and 20 of a catch lever 21. The said lever 21 is pivoted at 22 to one end of a lever 23 and is under the control of a spring 24. One end of the said spring 24 is connected to the lever 23,while the other end of said spring is connected to the end of the lever 21 opposite the inclined surfaceslQ and 20.

In the position the parts are shown 1n the drawings, the lower inclined surface ,20 is in engagement with the roller 18 of the pivotal arm 11, therebypermitting the spring 24 to press-the lever 21 downward upon said roller. When the lever 21 is lowcred, as presently described, the upper 1nclined surfaces 19 will engage the roller 18 and'will elevate the arm 11, thereby opening the switch. The lever 23 is pivoted at 25 to the frame 1, and the end of the lever 23 opposite the lever 21 is connected at 26 to a plungeror rod 27. 'Said rod 27 extends through an adjusting nut 28- and into a cylinder 30 where it engages a diaphragm 31 which is mounted betweena flange 32 of the cylinder 30 and a cap 33.

-.Thesaid cap 33 is'provided with an opento' the contactmembers 9, thus securing an effective contact. I do not wish to limiting 34 which receives a pipe or tube 35 leading from a reservoir (not shown) and which receives the fluid discharged by the pump (not shown) and which, as before stated, is controlled by the switch. The

pressure in the reservoir influences the diathe inclined surface 19 thereon engages the phragm 31. When this pressure rises, the diaphragm 31 will rise against the tension of a spring 36 within the cylinder 30, around the rod 27 and between the diaphragm and the adjusting nut 28. The rise of the diaphragm causes the lever 21 to lower, and

extent of movement of the arm 11, as determined by the stop 16, the greater will be the extent of movement of the diaphragm 31 necessary to'move. the lever 21 to elevate and lower the arm 11. Consequently,

thedifierence in pressurebetween that at whichthe pump starts and that at which it stops is determined by the stop 16. The pressure at which the pump stops and at which the circuit is broken is determined by varying the tension of the spring 36' by the nut, while the difierence in pressure between that at which the pump starts and when it'stops is determined by the' stop 16.

Having described my invention, I claim:

In a device of the character specified, the combination with a lever, and a roller mounted thereon, of stops for said lever one of which is adjustable with reference thereto, a second lever having inclined portions engaging said roller and controlling the position of said first named lever between said stops, a third lever upon which said second named lever is fulcrumed, and means for actuating said third named lever, whereby the second named lever is caused 1,0 move across the plane of the first named ever.

ture, inpresence of two witnesses.

. I AUGUSTINE J. POCOCK. Witnesses: 1

' R. JMCCARTY.

MATTHEW SIEBLER.

, In' testimony whereof I afiix my signa-' 

